JP6944254B2 - Absorbent article packaging - Google Patents

Description

The present invention relates to an absorbent article package.

There is known an absorbent article package in which an absorbent article such as a sanitary napkin or an incontinence pad is folded and individually wrapped with a packaging sheet. In such an absorbent article packaging body, a lead tape for pinching and pulling with a finger may be provided on the packaging sheet when unfolding from the state of being folded in the longitudinal direction. For example, in Patent Document 1, in an absorbent article packaging body in which one end edge portion in the longitudinal direction of the packaging sheet is folded over the surface of the packaging sheet and a lead tape is provided so as to straddle the end edge portion. , A technique is disclosed in which a lead tape can be fixed (bonded) to the edge portion with a strong strength by partially smoothing the edge portion.

Patent No. 4426163 Public Relations

However, in Patent Document 1, when the lead tape is pulled in the longitudinal direction during the unfolding of the absorbent article packaging body, the packaging sheet is placed at the “edge” portion of the packaging sheet in the longitudinal direction, which is the position where the strongest force acts. Not smoothed. In this case, the "edge" of the packaging sheet becomes the base point at which the base end portion (that is, the joint portion) of the lead tape is peeled off, the entire fixing portion of the lead tape is peeled off from the edge portion of the packaging sheet, and only the lead tape is peeled off from the packaging sheet. It may come off.
The present invention has been made in view of the above problems, and an object of the present invention is to provide an absorbent article package in which the joint portion of the lead tape does not easily come off when unfolded. ..

The main invention for achieving the above object is
It has a vertical direction, a horizontal direction, and a thickness direction that intersect each other.
It has an absorbent article, a packaging sheet, and a lead tape provided along the vertical direction.
An absorbent article package in which the absorbent article and the packaging sheet are stacked in the thickness direction.
The packaging sheet is a non-woven fabric having a predetermined density and a predetermined thickness, and includes a first edge portion including one end in the longitudinal direction in an unfolded state and a second end including the other end in the longitudinal direction. Has two edge edges
In the folded state of the absorbent article and the packaging sheet, the first edge portion is arranged outside the second edge portion in the thickness direction.
The base end side of the lead tape is fixed to the surface of the first end edge portion.
In the vertical direction, the free end side of the lead tape protruding outward from the first edge portion is detachably attached to the surface of the packaging sheet.
The first edge portion has a density higher than the predetermined density in a region having a predetermined width from at least one end in the vertical direction in a portion overlapping the base end side of the lead tape. Is high, and the thickness is thinner than the predetermined thickness .
An adhesive for joining the first edge portion to the packaging sheet is provided along the lateral direction.
The packaging sheet has a density higher than the predetermined density and is provided at intervals from a region having a thickness lower than the predetermined thickness, and has a higher density than the predetermined density. Has other areas that are thinner than the thickness of
The other region is provided inside the adhesive in the thickness direction.
In the longitudinal direction, the adhesive is an absorbent article package, characterized in that it overlaps the other area.
Other features of the present invention will be clarified by the description in the present specification and the accompanying drawings.

According to the present invention, it is possible to provide an absorbent article package in which the joint portion of the lead tape does not easily come off when unfolded.

It is a schematic perspective view of the napkin 1 in the folded individually wrapped state. It is a schematic plan view when the napkin 1 in the unfolded state is seen from the skin side. It is a schematic plan view when the napkin 1 in the unfolded state is seen from the non-skin side. It is the schematic cross-sectional view which showed the AA cross section of FIG. It is a schematic plan view of the napkin 1 in the folded individually wrapped state. It is the schematic cross-sectional view which showed the BB cross section of FIG. FIG. 7A is a diagram illustrating an operation when opening the absorbent article packaging body 100 which does not have a high-density portion in the packaging sheet. FIG. 7B is a diagram illustrating an operation when opening the individually wrapped napkin 1. It is the schematic perspective view which showed the operation of pulling the lead tape 50 at the time of opening the napkin 1 in the individually wrapped state. It is a schematic plan view when the napkin 2 in the unfolded state is seen from the skin side. FIG. 5 is a schematic plan view showing a state in which the unfolded napkin 2 is folded in the vertical direction at the first fold F1. It is the schematic cross-sectional view which showed the CC cross section of FIG.

The description of this specification and the accompanying drawings will clarify at least the following matters.
It has a vertical direction, a horizontal direction, and a thickness direction that intersect with each other, and has an absorbent article, a packaging sheet, and a lead tape provided along the vertical direction, and the absorbent article and the packaging sheet. Is an absorbent article package in which is stacked in the thickness direction, and the packaging sheet is a non-woven fabric having a predetermined density and a predetermined thickness, and includes one end in the longitudinal direction in an unfolded state. The first edge portion has a first edge portion and a second edge portion including the other end in the longitudinal direction, and the first edge portion is said to be in a folded state of the absorbent article and the packaging sheet. It is arranged outside the second end edge portion in the thickness direction, and the base end side of the lead tape is fixed to the surface of the first end edge portion, and the first end portion is fixed in the vertical direction. The free end side of the lead tape protruding outward from the edge portion is detachably attached to the surface of the packaging sheet, and the first end edge portion is the base end side of the lead tape in the thickness direction. In the region having a predetermined width from at least one end of the vertical direction, the density is higher than the predetermined density and the thickness is thinner than the predetermined thickness. An absorbent article packaging characterized by being present.

According to such an absorbent article packaging body, the fibers in the region overlapping the base end portion of the lead tape in the thickness direction of the packaging sheet are compacted, and the surface of the non-woven fabric is in a smooth state. The bonding strength at the base end of the tape is increased. In particular, at the longitudinal end of the packaging sheet on which a large force acts when the lead tape is pulled, the bonding strength of the lead tape base end is increased, so that the lead tape is less likely to come off from the packaging sheet.

In such an absorbent article package, the first edge portion has a density higher than the predetermined density in the entire portion overlapping the base end side of the lead tape in the thickness direction. It is desirable that the thickness is thinner than the predetermined thickness.

According to such an absorbent article packaging body, the bonding strength of the lead tape base end portion is increased in the entire region of the packaging sheet that overlaps with the lead tape base end portion in the thickness direction. Therefore, it becomes easier to prevent the lead tape from coming off the packaging sheet.

In such an absorbent article packaging body, the packaging sheet has a density higher than the predetermined density in a region having a predetermined width from both ends in the lateral direction of a portion overlapping with the lead tape, and the density is higher than the predetermined density. It is desirable that the thickness is thinner than the predetermined thickness.

According to such an absorbent article package, the lead tape is unlikely to come off even when a force for peeling the lead tape from the packaging sheet acts at both ends in the lateral direction of the base end portion of the lead tape. Further, when the lead tape is joined to the packaging sheet during manufacturing, the base end portion of the lead tape can be arranged in the high-density portion (high-strength portion) of the packaging sheet even if the joining position is displaced in the lateral direction. Therefore, it is possible to suppress the weakening of the bonding strength of the lead tape.

In the absorbent article packaging body, the width in the horizontal direction of the region of the packaging sheet having a density higher than the predetermined density and a thickness thinner than the predetermined thickness is the vertical direction. It is desirable that the one-sided end in the above is wider than the other-side end in the vertical direction.

According to such an absorbent article package, when the lead tape is pulled, the greatest force is likely to be applied at the intersection of one end of the packaging sheet in the vertical direction and both ends in the horizontal direction of the lead tape. .. Therefore, by forming a wide high-density portion (high-strength portion) on one side in the vertical direction of the packaging sheet, it is possible to easily prevent the fibers of the non-woven fabric from peeling off or the non-woven fabric from being torn.

In such an absorbent article packaging body, an end adhesive region for joining the one end edge portion to the packaging sheet is provided along the horizontal direction, and in the vertical direction, the end adhesive region is provided. It is desirable that it overlaps with a region that is denser than the predetermined density and thinner than the predetermined thickness.

According to such an absorbent article package, the adhesive forming the end adhesive region permeates the high-density portion of the non-woven fabric and exudes to the upper side (front side of the product) in the thickness direction of the non-woven fabric. Can be suppressed. Therefore, the surface of the absorbent article package is prevented from being sticky due to the adhesive.

In such an absorbent article package, a central high-density portion, which is a region having a density higher than the predetermined density and a thickness thinner than the predetermined thickness in the central portion in the lateral direction, and the central portion. Both sides of the high-density portion in the lateral direction have a high-density portion on both sides, which is a region having a density higher than the predetermined density and a thickness thinner than the predetermined thickness. At the edge portion, it is desirable that the central high-density portion and the both-side high-density portion are arranged side by side at a predetermined interval in the lateral direction.

According to such an absorbent article packaging body, in the region between the central high-density portion and the high-density portions on both sides, the fibers of the non-woven fabric constituting the packaging sheet are easily stretched, so that the force for pulling the lead tape in the region is likely to occur. Is dispersed, so that the force is suppressed from being concentrated on both ends of the lead tape in the lateral direction. As a result, the adhesive at the base end portion of the lead tape is less likely to be peeled off at both ends in the lateral direction, and it becomes easier to prevent the lead tape from being detached from the packaging sheet.

The absorbent article packaging has a sealing region for joining the packaging sheets stacked in the thickness direction on both side portions in the lateral direction, and at least a part of the high-density portions on both sides is formed. It is desirable that it overlaps with the sealing area.

According to such an absorbent article package, the strength of the nonwoven fabric is high in the region where the high-density portions on both sides are formed. Therefore, when the sealing region is peeled off when the absorbent article is opened, the nonwoven fabric is formed in the sealing region. It becomes easier to prevent the tearing.

In such an absorbent article package, it is desirable that the area of the central high-density portion is larger than the area of each of the two-sided high-density portions.

According to such an absorbent article package, the strength of the nonwoven fabric is high in the region where the high-density portions on both sides are formed. Therefore, when the sealing region is peeled off when the absorbent article is opened, the nonwoven fabric is formed in the sealing region. It becomes easier to prevent the tearing

The sum of the areas of the regions of the first edge portion of the absorbent article package, which are denser than the predetermined density and thinner than the predetermined thickness, is the predetermined sum. It is desirable that it is larger than the sum of the density of the above and the area of the region having the predetermined thickness.

According to such an absorbent article package, increasing the proportion of the high-density region at the first edge portion causes problems such as seepage of the adhesive and tearing of the non-woven fabric at the first edge portion. It becomes easier to suppress.

In such an absorbent article package, the absorbent article has wings on both sides in the lateral direction, and the packaging sheet has a density higher than the predetermined density and a thickness higher than the predetermined thickness. In a state where the absorbent article and the packaging sheet are folded, the second edge portion has a high-density region in which a plurality of high-density portions, which are thinned portions, are lined up along the lateral direction. A wing separator is provided between the wing portion and the wrapping sheet, and the wing separator is joined to the wrapping sheet by a wing separator joining portion, and the wing separator joining portion is joined in the vertical direction. Is preferably overlapped with the high density region.

According to such an absorbent article packaging body, the joining strength of the wing separator joint portion for joining the wing separator and the packaging sheet becomes high, and the wing separator comes off from the packaging sheet when the absorbent article packaging body is opened or the like. It is suppressed that it is stored. In addition, the adhesive forming the wing separator is less likely to seep out to the opposite side of the packaging sheet (nonwoven fabric) in the thickness direction, and the surface of the packaging sheet can be prevented from becoming sticky.

=== 1st Embodiment ===
<Structure of absorbent article packaging>
As an example of the absorbent article package (individual package) according to the first embodiment, a sanitary napkin 1 (hereinafter, also simply referred to as a napkin 1) will be described. Although the napkin 1 will be described below, the absorbent article package of the present embodiment also includes a so-called pantyliner, an incontinence pad, and the like, and is limited to sanitary napkins. is not it.

FIG. 1 is a schematic perspective view of a folded napkin 1 in an individually wrapped state. FIG. 2 is a schematic plan view of the unfolded napkin 1 as viewed from the skin side. FIG. 3 is a schematic plan view of the unfolded napkin 1 when viewed from the non-skin side. FIG. 4 is a schematic cross-sectional view showing the AA cross section of FIG.

As shown in FIGS. 1 to 4, the napkin 1 of the present embodiment has an absorbent article 10, a packaging sheet 20, and a lead tape 50. Further, a separator 30 is provided between the absorbent article 10 and the packaging sheet 20 in the thickness direction.

In the following description, each direction is defined as shown in FIGS. 1 to 4. That is, the direction of the unfolded napkin 1 (absorbent article 10, packaging sheet 20) along the product longitudinal direction is defined as the "vertical direction". The vertical direction has a "front side" and a "rear side". This "front side" is the direction that is the ventral side of the user when the absorbent article 10 is used, and the "rear side" is the direction that is the back side of the user when the absorbent article 10 is used. Further, the direction orthogonal to the vertical direction, that is, the direction along the product width direction is defined as the "horizontal direction". Further, the direction orthogonal to the vertical direction and the horizontal direction is defined as the "thickness direction", and the side that comes into contact with the skin of the user (wearer) when the absorbent article 10 is used (when worn) is defined as the "skin side". The opposite side is the "non-skin side".

The absorbent article 10 includes an absorbent core 11 that absorbs liquid, a top sheet 12 that covers the absorbent core 11 from the user's skin side, and a back sheet 13 that covers the absorbent core 11 from the user's non-skin side. (See FIGS. 2 and 4).

The absorbent core 11 is a vertically long member that is long in the vertical direction, contains hydrophilic fibers, pulp, and the like, and can efficiently absorb and retain a liquid such as a body fluid. The absorbent core 11 may be formed by laminating hydrophilic fibers or powders by an airlaid method, or may be an airlaid sheet obtained by molding hydrophilic fibers or powders into a sheet by an airlaid method. The top sheet 12 has a center top sheet 12A stacked on the skin side of the absorbent core 11 and side top sheets 12B stacked on both sides of the center top sheet 12A in the lateral direction. Both the center top sheet 12A and the side top sheet 12B are liquid-permeable sheet members that allow liquids such as body fluids to permeate, and are formed of, for example, non-woven fabric. However, the material is not particularly limited as long as it is a sheet member having a structure that allows liquid to permeate and is a member that is safe when it comes into contact with the skin of the user when the napkin 1 is used. For example, it may be a woven fabric or a mesh sheet. The back sheet 13 is a non-liquid permeable sheet member, for example, a breathable resin film is bonded to a film mainly made of polyethylene or propylene, a breathable resin film, a spunbond, or a non-woven fabric such as spunlace. It is formed by a sheet or the like. Since the back sheet 13 is non-liquid permeable, the liquid that permeates the top sheet 12 (12A, 12B) and is absorbed by the absorbent core 11 when the napkin 1 is used is on the clothing side (non-skin side) such as underwear. ) Is suppressed.

The packaging sheet 20 is a sheet member that individually wraps the absorbent articles 10. The packaging sheet 20 is joined to the absorbent article 10 in a state of being overlapped with the absorbent article 10 in the thickness direction before the use of the napkin 1, and is removed from the absorbent article 10 when the napkin 1 is used. In the present embodiment, the packaging sheet 20 is a substantially rectangular sheet member having long sides in the longitudinal direction (longitudinal direction), and the absorbent article 10 and the packaging sheet 20 are separated from each other by a hot melt adhesive via a separator 30. It is joined by the main body adhesive portion 131 and the packaging sheet joint portion 132 provided with such an adhesive (see FIG. 4). Of the unfolded packaging sheet 20, a region having a predetermined width including the end 20ef on one side (front side in the vertical direction in FIG. 2) in the longitudinal direction is defined as the first edge portion 20rf, and the other side in the longitudinal direction (FIG. 2). In 2, a region having a predetermined width including the end 20 eb in the vertical direction) is defined as the second end edge portion 20 rb. Further, a region having a predetermined width including the end 20es of the packaging sheet 20 in the lateral direction is defined as the side end 20rs.

As the material of the packaging sheet 20, a non-woven fabric, for example, an SMS (spun bond / melt blown / spun bond) non-woven fabric is used. In the conventional absorbent article packaging body (individual packaging body), a resin or film packaging sheet is often used. On the other hand, in the napkin 1 of the present embodiment, by using the non-woven fabric packaging sheet 20, it is difficult for a rattling zipping sound to be generated at the time of opening, and it is difficult for others to notice when using the napkin 1. In addition, the soft touch peculiar to non-woven fabric can give a sense of security to the user (wearer).

The packaging sheet 20 is subjected to a predetermined embossing treatment in the thickness direction over the entire area of the surface of the non-woven fabric. For example, in a state where the spunbonded non-woven fabric and the melt-blown non-woven fabric are laminated, a large number of heat-sealing portions (not shown) which are portions pressurized and heated in the form of fine dots are formed on the entire surface of the packaging sheet 20. As a result, the packaging sheet has a predetermined density ρ20 and a predetermined thickness t20. The density ρ 20 is a value calculated by measuring the weight of the packaging sheet 20 cut out to a predetermined size (area). The thickness t20 is, for example, a dial thickness gauge ID-C1012C manufactured by Mitutoyo Co., Ltd. or an equivalent one, and the contact area is set to 20 cm ² and the contact pressure is set to ^{3 gf / cm 2.} It is the average value of the values measured at a plurality of points on the surface.

Further, a high-density portion 25 is formed in a predetermined region of the packaging sheet 20 by performing a compression treatment separately from the embossing treatment described above. The high-density portion 25 has a higher density than the predetermined density ρ20 and is thinner than the predetermined thickness t20. The compression process for forming the high-density portion 25 is performed by applying a known pressure process such as a calendar process or an embossing process to a predetermined area of the packaging sheet 20 (nonwoven fabric). Therefore, in the high-density portion 25, the fibers on the surface of the non-woven fabric are compacted, so that the fine irregularities on the surface are reduced and the surface is in a smooth state as compared with the region where the high-density portion 25 is not formed. ..

In the packaging sheet 20 of the present embodiment, as shown by the black-painted portion in FIG. 3, the first high-density region 251, the second high-density region 252, the third high-density region 253, and the third high-density region 253, respectively, are arranged along the lateral direction. The four high-density regions of the fourth high-density region 254 are arranged side by side in the vertical direction. In FIG. 2, for convenience of explanation, the display of the high-density regions 251 to 254 is omitted. Each of the high-density regions 251 to 254 is formed by arranging a plurality of high-density portions 25 having a predetermined size and shape at intervals in the lateral direction. Of these, the first high-density region 251 is formed at a position overlapping the first edge portion 20rf of the packaging sheet 20. Further, in the following description, of the plurality of high-density portions 25 forming the first high-density region 251, the area is provided at a position overlapping the lead tape 50 (base end portion 50s) at the center in the lateral direction. The large high-density portion 25 is referred to as a central high-density portion 251c, and a plurality of high-density portions 25 provided on both lateral sides of the central high-density portion 251c are referred to as both-side high-density portions 251s.

A lead tape 50 is provided on the first edge portion 20rf (end 20ef) of the packaging sheet 20. The lead tape 50 is formed of, for example, a polypropylene film, and the base end portion 50s, which is the other end portion in the longitudinal direction, is bonded and fixed to the non-skin side surface of the first edge portion 20rf. The base end portion 50s is fixed via an adhesive layer 55 formed by an adhesive such as a hot melt adhesive. On the other hand, one end of the lead tape 50 in the longitudinal direction has a free end 50f protruding outward in the longitudinal direction (front side in the vertical direction) from the first edge portion 20rf (end 20ef) of the packaging sheet 20. Is forming. Details regarding the configuration and function of the lead tape 50 will be described later.

The separator 30 is a sheet member arranged between the back sheet 13 of the absorbent article 10 and the packaging sheet 20 (see FIG. 4). The skin-side surface of the separator 30 is peeled off using a silicon resin or the like, and is detachably attached to the main body adhesive portion 131 provided between the separator 30 and the absorbent article 10. Since the peeling process is known, the description thereof will be omitted. On the other hand, the non-skin side surface of the separator 30 is fixed (joined) to the packaging sheet by the packaging sheet joining portion 132 provided between the separator 30 and the packaging sheet 20. By arranging such a separator 30, the adhesive forming the main body adhesive portion 131 adheres to the packaging sheet 20 and the adhesiveness of the main body adhesive portion 131 is weakened before the use of the absorbent article 10. Is suppressed, and the adhesive portion 131 of the main body is protected. When the absorbent article 10 is used, the separator 30 is peeled off from the main body adhesive portion 131 together with the packaging sheet 20, and the absorbent article 10 is fixed to the user's underwear or the like by the adhesive force of the main body adhesive portion 131. NS.

In the present embodiment, the individually wrapped napkin 1 is folded in the vertical direction by a plurality of creases along the horizontal direction. Specifically, the napkin 1 is folded in three in the vertical direction by the two folds F1 and F2. The first fold F1 is arranged behind the center position in the vertical direction of the napkin 1, and the second fold F2 is arranged in front of the center position in the vertical direction of the napkin 1 (FIG. 1. See Fig. 2).

<About individual packaging of napkin 1>
Next, the individually wrapped state of the napkin 1 will be described. FIG. 5 is a schematic plan view of the folded individually wrapped napkin 1. FIG. 6 is a schematic cross-sectional view showing the BB cross section of FIG. Note that the separator 30 is not shown in FIG. 6 for convenience of explanation.

As described above, the napkin 1 is folded at the two folds F1 and F2, so that the absorbent article 10 is individually wrapped by the packaging sheet 20. When folding the napkin 1, first, the packaging sheet 20 and the absorbent article 10 (and the separator 30) are bent in the vertical direction so that the skin-side surface of the absorbent article 10 is on the inside with the first fold F1 as a base point. Be done. That is, the second edge portion 20rb (end 20eb) of the packaging sheet 20 is folded back from the outside to the inside in the vertical direction (longitudinal direction) with the first fold F1 as a base point. Subsequently, the packaging sheet 20 and the absorbent article 10 (and the separator 30) are bent in the vertical direction with the second fold F2 as a base point. That is, the first edge portion 20rf (end 20ef) of the packaging sheet 20 is folded back from the outside to the inside in the vertical direction (longitudinal direction) as the second fold F2 base point. As a result, in the napkin 1, the first edge portion 20rf of the packaging sheet 20 is arranged outside the second edge portion 20rb in the thickness direction (upper side in FIG. 6).

An end adhesive region 27 as shown in FIGS. 5 and 6 is formed in a region where the first edge portion 20rf of the packaging sheet 20 is overlapped with the packaging sheet 20 in the thickness direction. The end adhesive region 27 is formed by applying an adhesive in a strip shape along the lateral direction between the side end portions 20rs and 20rs on both sides of the packaging sheet 20 in the lateral direction, and as shown in FIG. 6, the first end adhesive region 27 is formed. The lower surface of the edge portion 20rf and the upper surface of the packaging sheet 20 overlapping the first edge portion 20rf are joined. The edge adhesive region 27 adheres the packaging sheets 20 stacked in the thickness direction at the first edge portion 20rf, and prevents the napkin 1 from being unfolded before the start of use. .. That is, it is possible to prevent the individually wrapped napkin 1 from being opened naturally.

Further, at the side end portions 20rs on both sides of the packaging sheet 20 in the lateral direction, a sealing region 29 is formed in which the packaging sheets 20 stacked in the thickness direction are joined (sealed) along the vertical direction. The seal region 29 is formed by using a known sealing means such as ultrasonic welding or heat welding. As a result, the folded packaging sheets 20 are joined to each other at the side end portions 20rs on both sides in the lateral direction, and the napkin 1 can be easily maintained in the folded individual packaging state as shown in FIGS. 1 and 5.

With respect to the napkin 1 that has been folded and individually wrapped in this way, the free end portion 50f of the lead tape 50 that protrudes outward in the vertical direction from the first end edge portion 20rf of the packaging sheet 20 is the adhesive layer 55. It is attached to the surface of the packaging sheet 20 via. That is, the lead tape 50 is arranged so as to straddle the end 20 ef of the packaging sheet 20 (see FIG. 6). The free end portion 50f of the lead tape 50 is detachably attached to the surface of the packaging sheet 20, and can be easily peeled off from the surface of the packaging sheet 20 when the napkin 1 is used. On the other hand, since the base end portion 50s of the lead tape 50 is pressure-bonded to the packaging sheet 20 and has high bonding strength, it is less likely to be peeled off from the surface of the packaging sheet 20 as compared with the free end portion 50f.

When the absorbent article 10 is used, the operation of unfolding the napkin 1 bent at the first fold F1 and the second fold F2 as shown in FIG. 2 and separating the packaging sheet 20 and the separator 30 from the absorbent article 10. Is done. When the napkin 1 is unfolded from the individually wrapped state, the free end portion 50f of the lead tape 50 is pinched by a finger of a user or the like and pulled from the inside to the outside in the thickness direction and from one side to the other in the vertical direction. Be done. By this operation, first, the free end portion 50f of the lead tape 50 is peeled off from the surface of the packaging sheet 20. Subsequently, the first end edge portion 20rf of the packaging sheet 20 is pulled via the lead tape 50, so that the end adhesive region 27 to which the first end edge portion 20rf is joined is peeled off and the napkin 1 is opened. NS.

FIG. 7A is a diagram illustrating, as a comparative example, an operation when opening the absorbent article packaging body 100 which does not have a high-density portion in the packaging sheet. FIG. 7B is a diagram illustrating an operation when opening the individually wrapped napkin 1 in the present embodiment. 7A and 7B are schematic cross-sectional views of an absorbent article package having a non-woven fabric packaging sheet when the action of pulling the lead tape is viewed from the side.

As described above, when opening the absorbent article package, the free end side of the lead tape is pulled from the inside to the outside in the thickness direction and from one side in the vertical direction to the other side in the thickness direction. The operation of peeling off the stacked packaging sheets is performed. When such an operation is performed, in the conventional absorbent article packaging body 100 shown in FIG. 7A, when the free end portion 150f of the lead tape 150 is strongly pulled, the lead tape is formed at the longitudinal end 120ef of the packaging sheet 120. The adhesive layer 155 that joins and fixes the base end portion 150s of the 150 may be peeled off from the packaging sheet 120, and the lead tape 150 may be separated from the packaging sheet 120.

When the packaging sheet 120 is made of a non-woven fabric, the surface of the non-woven fabric has fine irregularities formed by intricately entwining a plurality of fibers, and the surface is in a rough state when viewed microscopically. be. When the adhesive layer 155 is provided on such a surface, the area (contact area) of the contact portion between the adhesive forming the adhesive layer 155 and the surface of the non-woven fabric becomes small, and the adhesive (adhesive layer 155) becomes the surface of the non-woven fabric. It does not adhere sufficiently to the surface and easily peels off. As a result, the fibers on the surface of the packaging sheet 120 (nonwoven fabric) are peeled off together with the adhesive layer 155, so-called "fiber loss" occurs, or the non-woven fabric itself is torn, so that the lead tape 150 is easily detached.

By applying a smoothing treatment to a part of the packaging sheet 120 as in Patent Document 1 described above, it is possible to prevent the occurrence of fiber loss in the region. However, conventionally, there is no example in which the smoothing treatment is performed up to the end 120ef in the longitudinal direction of the packaging sheet 120. Therefore, peeling of the adhesive layer 155 is likely to occur at the end 120ef where the greatest force acts when pulling the lead tape 150, and the peeling propagates along the vertical direction of the packaging sheet 120, resulting in the result of FIG. 7A. As described above, the lead tape 150 is easily separated from the packaging sheet 120.

On the other hand, in the napkin 1 of the present embodiment, the high-density portion 25 (central high-density portion 251c) is formed in the entire region of the packaging sheet 20 that overlaps the base end portion 50s of the lead tape 50 in the thickness direction. Has been done. In the high-density portion 25, the fibers are compacted by applying the compression treatment to the surface of the packaging sheet 20, and the fine irregularities on the surface of the non-woven fabric are reduced to make the surface smooth. Therefore, by providing the adhesive layer 55 at a position overlapping the high-density portion 25, the area (contact area) of the portion where the adhesive and the surface of the non-woven fabric are in contact with each other is increased, and the adhesive force of the adhesive layer 55 is sufficiently increased. Can be strong. Further, since the high-density portion 25 itself has high strength, tearing of the non-woven fabric and fiber loss are unlikely to occur even when a force acts in the direction of peeling off the base end portion 50s of the lead tape 50.

In particular, in the napkin 1 of the present embodiment, unlike the conventional absorbent article packaging body, the high-density portion 25 (central high-density portion 251c) up to the vertical end 20ef of the first edge portion 20rf of the packaging sheet 20. Is formed. In other words, the first edge portion 20rf of the packaging sheet 20 is a portion overlapping the base end portion 50s of the lead tape 50 in the thickness direction in a region having a predetermined width from the end 20ef in the vertical direction. The density is higher than the predetermined density ρ20, and the thickness is thinner than the predetermined thickness t20. Therefore, as shown in FIG. 7B, the adhesive layer 55 is unlikely to peel off at the end 20ef where the largest force acts when the lead tape 50 is pulled, and it is effective that the lead tape 50 is separated from the packaging sheet 20. Can be suppressed.

Further, as shown in FIG. 5, the high-density portion 25 (central high-density portion 251c) formed on the first edge portion 20rf of the packaging sheet 20 is lateral to the base end portion 50s of the lead tape 50. It is an area with a large area on both sides of. In other words, the packaging sheet 20 has a density higher than the predetermined density ρ20 and a thickness t20 in the region having a predetermined width from both ends of the region overlapping with the lead tape 50 in the lateral direction. The thickness is getting thinner. Therefore, even if the position where the base end portion 50s of the lead tape 50 is joined and fixed to the packaging sheet 20 is slightly displaced in the lateral direction during the manufacture of the napkin 1, the adhesive layer 55 of the base end portion 50s overlaps with the high density portion 25. Since it can be arranged at the position where the lead tape 50 is formed, it is possible to prevent the lead tape 50 from being weakened in bonding strength.

When the lead tape 50 is pulled when the individually wrapped napkin 1 is opened, it acts on the packaging sheet 20 in the horizontal direction in addition to the force acting in the vertical direction (and the thickness direction) described with reference to FIG. Power also needs to be considered. FIG. 8 is a schematic perspective view showing an operation of pulling the lead tape 50 when opening the individually wrapped napkin 1. In the napkin 1 of the present embodiment, the lead tape 50 is fixed at a position substantially in the center in the lateral direction of the first edge portion 20rf (end 20ef) of the packaging sheet 20. Therefore, when the free end portion 50f of the lead tape 50 is pulled during the opening operation of the napkin 1, the lateral central portion of the end 20ef of the packaging sheet 20 is first pulled, and then the end of the packaging sheet 20 is pulled, as shown in FIG. The tensile force is transmitted to both sides of the 20 ef in the lateral direction. Therefore, when the lead tape 50 is pulled, a large force is applied to the packaging sheet 20 at the end point 50se, which is the point where both ends of the base end portion 50s of the lead tape 50 and the end 20ef of the packaging sheet 20 intersect in the lateral direction. Works.

Therefore, in the packaging sheet 20, the width W251f in the horizontal direction at one end (that is, the end 20ef) in the vertical direction of the central high-density portion 251c overlapping the base end portion 50s of the lead tape 50 is the other in the vertical direction. It is made longer than the lateral width W251b at the side edge (see FIG. 5). As described above, the high-density portion 25 (central high-density portion 251c) has a higher density than the predetermined density ρ20, and the strength of the non-woven fabric is high. Therefore, in the central high-density portion 251c, at the end 20ef on one side in the vertical direction, the width W251f is increased to provide a wide region with high strength (that is, the high-density portion 25), so that the lateral direction is provided at the end point 50se. Even when a large force is applied to the non-woven fabric, it becomes easy to prevent the fibers of the non-woven fabric from peeling off or the non-woven fabric from being torn.

The width W251b of the central high-density portion 251c having the narrowest width in the lateral direction is wider on both sides in the lateral direction than the base end portion 50s of the lead tape 50 as described above. Therefore, since the adhesive layer 55 of the base end portion 50s is arranged overlapping with the central high-density portion 251c in the entire area in the lateral direction, the adhesive layer 55 of the adhesive layer 55 is arranged even when a force is applied in the lateral direction. Peeling is unlikely to occur, and it is unlikely that the lead tape 50 will come off from the packaging sheet 20.

Further, in the individually wrapped napkin 1, as shown in FIG. 6, the adhesive layer 55 of the lead tape 50 and the end adhesive region 27 of the packaging sheet 20 overlap each other in the vertical direction (and the horizontal direction). It is located in. That is, the adhesive layer 55 and the end adhesive region 27 are arranged so as to overlap each other with the first edge portion 20rf of the packaging sheet 20 interposed therebetween. In such a case, if the high-density portion 25 (central high-density portion 251c) is not formed on the first edge portion 20rf, the adhesive forming the adhesive layer 55 and the end adhesive region 27 is a non-woven fabric. There is a risk of seeping out on the opposite side of the thickness direction. On the other hand, in the napkin 1, both the adhesive layer 55 and the end adhesive region 27 are arranged so as to overlap with the high-density portion 25 (central high-density portion 251c) having a high fiber density. Therefore, in the high-density portion 25, the movement and exudation of the adhesive in the thickness direction of the non-woven fabric is suppressed.

Further, the end adhesive region 27 of the packaging sheet 20 is arranged at a position overlapping in the vertical direction with the first high-density region 251 formed along the horizontal direction. That is, the adhesive forming the end adhesive region 27 is applied to a range of the packaging sheet 20 that overlaps with the first high-density region 251. As a result, the adhesive forming the end adhesive region 27 over the entire area of the first high-density region 251 is suppressed from seeping out to the upper side (front side of the product) in the thickness direction of the non-woven fabric. That is, of the first edge portion 20rf of the packaging sheet 20, not only the central portion (central high-density portion 251c) in the lateral direction but also the regions on both sides thereof suppress the exudation of the adhesive, and the napkin in the individually packaged state. It is possible to prevent the outer surface of 1 (packaging sheet 20) from becoming sticky.

Further, as shown in FIG. 6, the first high-density region 251 is formed by a central high-density portion 251c provided in the center in the lateral direction and a plurality of both-side high-density portions 251s provided on both sides thereof. A predetermined gap is provided between the central high-density portion 251c and the high-density portions 251s on both sides, or between the high-density portions 251s and 251s on both sides, respectively. That is, in the first high-density region 251, a portion having a predetermined density ρ20 and a predetermined thickness t20 (a portion in which the high-density portion 25 is not formed) and a portion having a density higher than the predetermined density ρ20 and a predetermined thickness A portion thinner than t20 (high-density portion 25) is arranged adjacent to each other in the lateral direction. That is, in the first edge portion 20rf of the packaging sheet 20, a portion where fibers are easily stretched (a portion where the high-density portion 25 is not formed) and a portion where fibers are difficult to stretch (high-density portion 25) are arranged next to each other. It will be done. With such a configuration, it is possible to facilitate the work of opening the individually wrapped napkin 1.

For example, when the lead tape 50 is pulled as shown in FIG. 8, the force for pulling the lead tape 50 is transmitted to both sides in the lateral direction along the first edge portion 20rf (end 20ef) of the packaging sheet 20. At this time, assuming that the high-density portion 25 is formed on the entire first edge portion 20rf, the force pulling the lead tape 50 strikes the end points 50se at both ends in the lateral direction of the lead tape 50 (base end portion 50s). The adhesive layer 55 may be easily peeled off at the end point 50se by acting like a force. On the other hand, in the present embodiment, since the portion where the fiber is easily stretched is provided at the lateral position of the first edge portion 20rf, the force is dispersed in order to stretch the fiber in the portion where the fiber is easily stretched. To work. Therefore, it becomes difficult for the force to concentrate on the end points 50se at both ends in the lateral direction of the lead tape 50 (base end portion 50s), and it becomes easier to prevent the lead tape 50 from being separated from the packaging sheet 20.

When the ratio of the portion where the high-density portion 25 is formed is smaller than the ratio of the portion where the high-density portion 25 is not formed in the first edge portion 20rf, that is, the high-density portion 25 is formed. If the area of the portion is relatively small, it may be difficult to sufficiently suppress problems such as seepage of the adhesive and tearing of the non-woven fabric as described above. On the other hand, in the packaging sheet 20 of the present embodiment, the sum of the areas of the portions of the first edge portion 20rf having a density higher than the predetermined density ρ20 and thinner than the predetermined thickness t20 is predetermined. It is configured to be larger than the sum of the areas of the portions having the density ρ20 and the predetermined thickness t20. Therefore, it is easy to suppress the seepage of the adhesive and the tearing of the non-woven fabric in the entire region of the first edge portion 20rf.

Further, the first high-density region 251 formed along the first edge portion 20rf is formed from the side end portion 20rs on one side in the lateral direction of the packaging sheet 20 to the side end portion 20rs on the other side. ing. Therefore, the high-density portions 251s on both sides forming the first high-density region 251 overlap with at least a part of the sealing region 29 of the packaging sheet 20 (see FIG. 5). As a result, the strength of the non-woven fabric is increased in the overlapping portion, and it becomes easy to prevent the non-woven fabric from being torn in the seal region 29 when the seal region 29 is peeled off. For example, when the individually wrapped napkin 1 is opened as shown in FIG. 8, when the force for pulling the lead tape 50 is transmitted to the seal region 29, it overlaps with the high-density portions 251s on both sides in the seal region 29. Since the strength of the part is high, the packaging sheet is very difficult to tear when a large force is applied to the part.

=== Second embodiment ===
<Structure of absorbent article packaging>
In the second embodiment, as an example of the absorbent article package (individual package), a sanitary napkin 2 having a wing portion (hereinafter, also simply referred to as a napkin 2) will be described. FIG. 9 is a schematic plan view of the unfolded napkin 2 as viewed from the skin side. The shape of the absorbent article 10 of the napkin 2 of the second embodiment is different from that of the napkin 1 of the first embodiment. Further, the packaging sheet 20 of the napkin 2 is provided with a wing portion separator 35, which will be described later. Other basic configurations of the napkin 2 are substantially the same as those of the napkin 1 of the first embodiment.

In the napkin 2, the absorbent article 10 has a wing portion 15. In the wing portion 15, at least one of the top sheet 12 and the back sheet 13 is located at both ends in the lateral direction in the vicinity of the central portion in the vertical direction of the absorbent article 10, that is, between one end and the other end in the longitudinal direction of the product. It is formed by extending outward from the part. On the non-skin side surface of the wing portion 15 in the thickness direction, a wing adhesive portion 151 coated with an adhesive of a hot melt adhesive is provided as in the main body adhesive portion 131. When using the absorbent article 10, the main body adhesive portion 131 of the absorbent article 10 is attached to the inside of the crotch part (skin side) of the underwear, and then the wing portion 15 is bent toward the non-skin side to form the wing adhesive portion 151. Attach it to the outside of the inseam (non-skin side) of the underwear. As a result, the absorbent article 10 is fixed so that the crotch portion of the underwear is sandwiched between the main body adhesive portion 131 and the wing adhesive portion 151, and it becomes easy to suppress misalignment or the like when the absorbent article 10 is worn.

Further, in the napkin 2, the second edge portion 20rb on the rear side in the vertical direction of the packaging sheet 20 projects to the rear side in the vertical direction (outside in the longitudinal direction) from the absorbent article 10 as shown in FIG. There is. That is, the vertical dimension of the packaging sheet 20 is longer than the vertical dimension of the absorbent article 10. A fifth high-density region 255 is formed on the second edge portion 20rb by a plurality of high-density portions 25 arranged along the lateral direction. The high-density portion 25 of the non-woven fabric is subjected to the same compression treatment as in the first embodiment, so that the density is higher than the predetermined density ρ20 and the thickness is thinner than the predetermined thickness t20. ..

A wing separator joint 135 is formed by applying an adhesive such as a hot melt adhesive on the skin side of the second edge portion 20 rb in the thickness direction. The wing separator 35 is joined and fixed to the skin side of the packaging sheet 20 in the thickness direction via the wing separator joint portion 135. Like the separator 30, the wing separator 35 is a sheet member whose skin-side surface is peeled off using a silicon resin or the like.

FIG. 10 is a schematic plan view showing a state in which the unfolded napkin 2 is folded in the vertical direction at the first fold F1. FIG. 11 is a schematic cross-sectional view showing the CC cross section of FIG.

When the napkin 2 is individually wrapped as shown in FIG. 1, first, the wing portions 15 projecting on both sides of the absorbent article 10 in the lateral direction are folded back inward in the lateral direction. In FIG. 10, in the lateral direction so that the skin-side surface of the absorbent article 10 is on the inside with the first wing fold FW1 and the second wing crease FW2 arranged along the vertical direction at predetermined positions in the horizontal direction as base points. Wing portions 15 and 15 on both sides are folded from the outside to the inside in the lateral direction, respectively. In this state, the wing adhesive portion 151 is exposed on the upper side in the thickness direction.

Subsequently, the packaging sheet 20 and the absorbent article 10 (and the separator 30) are bent in the vertical direction so that the skin-side surface of the absorbent article 10 is on the inside with the first fold F1 as a base point. That is, the second edge portion 20rb (end 20eb) of the packaging sheet 20 is folded back from the outside to the inside in the vertical direction (longitudinal direction) with the first fold F1 as a base point. At this time, the peeled surface (lower surface in FIG. 11) of the wing separator 35 joined to the second edge portion 20rb is detachably attached to the wing adhesive portion 151. As a result, the adhesive forming the wing adhesive portion 151 is suppressed from adhering to the packaging sheet 20 before the use of the absorbent article 10, and the wing adhesive portion 151 is protected.

In the napkin 2 of the second embodiment, the wing separator joint portion 135 is provided at a position overlapping the fifth high-density region 255 in the vertical direction and the horizontal direction. As described above, in the high-density portion 25 (fifth high-density region 255), the fibers of the non-woven fabric are compacted, fine irregularities are reduced, and the surface is in a smooth state. Therefore, the contact area between the adhesive and the surface of the non-woven fabric is larger than that in the region where the high-density portion 25 is not formed, and the adhesive strength between the wing separator joint portion 135 and the packaging sheet 20 is increased. As a result, the wing separator joint 135 is peeled off when the individually wrapped napkin 2 is opened, so that the wing separator 35 is separated from the packaging sheet 20 or the separator 35 remains on the recoverable article 10 side. It is suppressed from being chilled.

Further, since the wing separator joint portion 135 and the fifth high-density region 255 overlap each other, the adhesive forming the wing separator joint portion 135 in the region is in the thickness direction of the packaging sheet 20 (nonwoven fabric). It becomes difficult to seep to the other side. As a result, it is possible to prevent the surface of the packaging sheet 2 from becoming sticky.

=== Other embodiments ===
Although the embodiments of the present invention have been described above, the above-described embodiments are for facilitating the understanding of the present invention, and are not for limiting the interpretation of the present invention. Further, it goes without saying that the present invention can be modified or improved without departing from the spirit thereof, and the present invention includes an equivalent thereof. For example, the following modifications are possible.

<About absorbent article 10>
In the above-described embodiment, the absorbent article 10 having a vertically long substantially elliptical shape as shown in FIG. 1 has been described, but the shape and configuration of the absorbent article 10 are not limited to this. For example, a so-called wing may be provided by extending the top sheet 12 and the back sheet 13 outward from both ends in the lateral direction in the vicinity of the central portion in the vertical direction of the absorbent article 10. Further, in FIG. 1, a linear pressing portion is shown on the surface of the absorbent article 10, but a pressing portion having another shape may be provided, or the linear pressing portion may not be provided. Is also good.

<How to fold the napkin 1>
In the above-described embodiment, an example of an individually packaged state of the napkin 1 in which the absorbent article 10 and the packaging sheet 20 are folded in three in the vertical direction by being folded at the first fold F1 and the second fold F2 will be described. However, the folding method of the napkin 1 is not limited to this. For example, the napkin 1 may be folded in four or more.

1 Sanitary napkin (napkin),
2 Sanitary napkins (napkins),
10 Absorbent article, 10ef Absorbent article front end,
11 Absorbent core,
12 top sheet, 12A center top sheet, 12B side top sheet,
13 back seat,
20 packaging sheet,
20ef end (one side), 20rf first end edge,
20eb end (other side), 20rb second end edge,
20rs side end,
25 high density part,
251 First high density area, 251c Central high density part, 251s High density part on both sides,
252nd high density region, 253 third high density region, 254 fourth high density region,
255th high density area,
27 end adhesive area, 29 seal area,
30 Separator,
35 wing separator,
50 lead tape, 50s base end, 50f free end,
55 Adhesive layer,
131 Body adhesive part, 132 Packaging sheet joint part,
135 wing separator joint,
151 wing adhesive part,
t20 thickness, ρ20 density,
F1 1st fold, F2 2nd fold

Claims (10)

It has a vertical direction, a horizontal direction, and a thickness direction that intersect each other.
It has an absorbent article, a packaging sheet, and a lead tape provided along the vertical direction.
An absorbent article package in which the absorbent article and the packaging sheet are stacked in the thickness direction.
The packaging sheet is a non-woven fabric having a predetermined density and a predetermined thickness, and includes a first edge portion including one end in the longitudinal direction in an unfolded state and a second end including the other end in the longitudinal direction. Has two edge edges
In the folded state of the absorbent article and the packaging sheet, the first edge portion is arranged outside the second edge portion in the thickness direction.
The base end side of the lead tape is fixed to the surface of the first end edge portion.
In the vertical direction, the free end side of the lead tape protruding outward from the first edge portion is detachably attached to the surface of the packaging sheet.
The first edge portion has a density higher than the predetermined density in a region having a predetermined width from at least one end in the vertical direction in a portion overlapping the base end side of the lead tape. Is high, and the thickness is thinner than the predetermined thickness .
An adhesive for joining the first edge portion to the packaging sheet is provided along the lateral direction.
The packaging sheet has a density higher than the predetermined density and is provided at intervals from a region having a thickness lower than the predetermined thickness, and has a higher density than the predetermined density. Has other areas that are thinner than the thickness of
The other region is provided inside the adhesive in the thickness direction.
An absorbent article package, characterized in that, in the longitudinal direction, the adhesive overlaps the other area. The absorbent article packaging according to claim 1.
The first edge portion has a density higher than the predetermined density and a thickness thinner than the predetermined thickness in the entire portion overlapping the base end side of the lead tape. An absorbent article packaging characterized by. The absorbent article packaging according to claim 1 or 2.
The packaging sheet has a density higher than the predetermined density and a thickness lower than the predetermined thickness in a region having a predetermined width from both ends in the lateral direction to the outside of a portion overlapping the lead tape. An absorbent article packaging characterized by being. The absorbent article packaging according to claim 3.
The width of the region of the packaging sheet having a density higher than the predetermined density and being thinner than the predetermined thickness in the lateral direction is
An absorbent article package characterized in that one end in the vertical direction is wider than the other end in the vertical direction. The absorbent article packaging according to any one of claims 1 to 4.
In the vertical direction, the region provided with the adhesive overlaps with a region having a density higher than the predetermined density and a thickness thinner than the predetermined thickness. Absorbent article packaging. The absorbent article packaging according to any one of claims 1 to 5.
A central high-density portion, which is a region having a density higher than the predetermined density and a thickness thinner than the predetermined thickness in the central portion in the lateral direction, and a central high-density portion.
Both sides of the central high-density portion in the lateral direction have high-density portions on both sides, which are regions having a density higher than the predetermined density and a thickness thinner than the predetermined thickness.
An absorbent article packaging characterized in that, in the first edge portion , the central high-density portion and the both-side high-density portions are arranged side by side at a predetermined interval in the lateral direction. The absorbent article packaging according to claim 6.
On both sides in the lateral direction, there are sealing regions for joining the packaging sheets stacked in the thickness direction.
An absorbent article packaging characterized in that at least a part of the high density portions on both sides overlaps with the sealing region. The absorbent article packaging according to claim 6 or 7.
An absorbent article packaging characterized in that the area of the central high-density portion is larger than the area of each of the high-density portions on both sides. The absorbent article packaging according to any one of claims 1 to 8.
At the first edge
The sum of the areas of the regions that are denser than the predetermined density and thinner than the predetermined thickness is
It is larger than the sum of the areas having the predetermined density and the predetermined thickness.
An absorbent article packaging characterized by that. It has a vertical direction, a horizontal direction, and a thickness direction that intersect each other.
It has an absorbent article, a packaging sheet, and a lead tape provided along the vertical direction.
An absorbent article package in which the absorbent article and the packaging sheet are stacked in the thickness direction.
The packaging sheet is a non-woven fabric having a predetermined density and a predetermined thickness, and includes a first edge portion including one end in the longitudinal direction in an unfolded state and a second end including the other end in the longitudinal direction. Has two edge edges
In the folded state of the absorbent article and the packaging sheet, the first edge portion is arranged outside the second edge portion in the thickness direction.
The base end side of the lead tape is fixed to the surface of the first end edge portion.
In the vertical direction, the free end side of the lead tape protruding outward from the first edge portion is detachably attached to the surface of the packaging sheet.
The first edge portion has a density higher than the predetermined density in a region having a predetermined width from at least one end in the vertical direction in a portion overlapping the base end side of the lead tape. Is high, and the thickness is thinner than the predetermined thickness.
The absorbent article has wings on both sides in the lateral direction.
The packaging sheet has a high-density region in which a plurality of high-density portions, which are portions having a density higher than the predetermined density and a thickness thinner than the predetermined thickness, are lined up along the lateral direction. It has two edges and
A wing separator is provided between the wing portion and the wrapping sheet in a state where the absorbent article and the wrapping sheet are folded.
The wing separator is joined to the packaging sheet by a wing separator joint.
An absorbent article packaging characterized in that, in the longitudinal direction, the wing separator joint overlaps with the high density region.

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